Partial Marks on a Mulitiple Response question

Hi,

Does anyone know if it's possible to award partial marks on a multiple response question in Storyline?
i.e. I've got a question where 4 of 7 options are correct- if they pick 2 of those options, then they would get 5 marks, vs 10 marks for all 4.

I've looked around a bit but can't figure it out.

Thanks,

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